Mercurial > hg > graal-jvmci-8
diff src/share/vm/prims/whitebox.cpp @ 5915:2d503de963b3
7148152: Add whitebox testing API to HotSpot
Summary: Add an internal testing API to HotSpot to enable more targeted testing of vm functionality
Reviewed-by: phh, dholmes
author | mgerdin |
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date | Thu, 23 Feb 2012 14:58:35 +0100 |
parents | |
children | 51612f0c0a79 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/whitebox.cpp Thu Feb 23 14:58:35 2012 +0100 @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include "precompiled.hpp" + +#include "jni.h" + +#include "memory/universe.hpp" +#include "oops/oop.inline.hpp" +#include "prims/whitebox.hpp" +#include "runtime/interfaceSupport.hpp" +#include "runtime/os.hpp" +#include "utilities/debug.hpp" + +#ifndef SERIALGC +#include "gc_implementation/g1/concurrentMark.hpp" +#include "gc_implementation/g1/g1CollectedHeap.inline.hpp" +#include "gc_implementation/g1/heapRegionRemSet.hpp" +#endif // !SERIALGC + +bool WhiteBox::_used = false; + +// Entry macro to transition from JNI to VM state. + +#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header) +#define WB_END JNI_END + +// Definitions of functions exposed via Whitebox API + +WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) + return (jlong)(void*)JNIHandles::resolve(obj); +WB_END + +WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) + return heapOopSize; +WB_END + +#ifndef SERIALGC +WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) + G1CollectedHeap* g1 = G1CollectedHeap::heap(); + oop result = JNIHandles::resolve(obj); + const HeapRegion* hr = g1->heap_region_containing(result); + return hr->isHumongous(); +WB_END + +WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) + G1CollectedHeap* g1 = G1CollectedHeap::heap(); + size_t nr = g1->free_regions(); + return (jlong)nr; +WB_END + +WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) + G1CollectedHeap* g1 = G1CollectedHeap::heap(); + ConcurrentMark* cm = g1->concurrent_mark(); + return cm->concurrent_marking_in_progress(); +WB_END + +WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) + return (jint)HeapRegion::GrainBytes; +WB_END +#endif // !SERIALGC + +#define CC (char*) + +static JNINativeMethod methods[] = { + {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, + {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, +#ifndef SERIALGC + {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, + {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, + {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, + {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, +#endif // !SERIALGC +}; + +#undef CC + +JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) + { + if (WhiteBoxAPI) { + // Make sure that wbclass is loaded by the null classloader + instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); + Handle loader(ikh->class_loader()); + if (loader.is_null()) { + ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI + jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); + if (result == 0) { + WhiteBox::set_used(); + } + } + } + } +JVM_END